diff options
| -rw-r--r-- | drivers/acpi/video.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 9006942eacb..e58b53c86ae 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -73,6 +73,14 @@ static bool brightness_switch_enabled = 1; module_param(brightness_switch_enabled, bool, 0644); /* + * The Default is to let the OS handle brightness autoswitching due to + * AC/battery status changes. On some laptops (MSI Wind) this doesn't + * work so we need a workaround. + */ +static int brightness_autoswitch_via_bios = 0; +module_param(brightness_autoswitch_via_bios, bool, 0644); + +/* * By default, we don't allow duplicate ACPI video bus devices * under the same VGA controller */ @@ -1423,7 +1431,7 @@ static int acpi_video_bus_put_devices(struct acpi_video_bus *video) static int acpi_video_bus_start_devices(struct acpi_video_bus *video) { - return acpi_video_bus_DOS(video, 0, 1); + return acpi_video_bus_DOS(video, 0, !brightness_autoswitch_via_bios); } static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |